Brake



May 29, 1923.

BRAKE i G. J. THOMAS Filed Jan. 20. 1922 1 x *f i 1 a a s \\\l/I/ y,

ETC-1 I.- f y* 1 6** v 6 14: 14 5 'y 155| T531 1 14 6I y l' l l l l 7/ 7 5 l 4 l l 11 7 11 l l ma aunq/w91 E1-1E l I cofdef W70/77a@ Patented May 29 1923.

' GEORGE J. THOMAS, 0F LANSING, MICHIGAN.

BRAKE.

Application 'led January 20, 1922.

To all whom t may concern Be it known that I, yGEORGE J. THOMAS, a citizen of the United Lansing,lcounty' of Ingham, State of Michigan, have invented certain new and useful Improvements in Brakes, of which the following i's-a specification.

This invention relates to improvements in brakes.

The main objects of the invention are:

First, to provide an improved brake for motor vehicles and the like in which the brake shoes are arranged and supported so that they contact substantially throughout their entire periphery when the brake is set.

Second, to provide an improved brake in whichthe shoes may be quickly and easily adjusted to compensate for wear. A

Third, to provide an improved brake in which the parts are simple and economical in' structure and easily assembled.

Further objects, structural details, will denitely appear from the detailed description to follow.

I acomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly described and pointed out in the claims.

A structure which is a preferred embodiment of my invention is clearly illustrated in the accompanying drawing, forming a part of this application, in which:

Fig. I is a vertical section through the drum of a brake embodying the features of my invention on a line corresponding to line 1-1 of Figs. II and III. A

Fi II is a detail section on a line correspon "ng to line 2-2 of Fig. I.

Fig. III is a detail section on a line corres ondin to line 3 3 of Fig. I.

1in the rawing'similar re erence characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawings, 1 represents the drum of a brake embodying my improvements as. I have embodied them for motor vehicles.A

The brake shoes 2 are of segmental shape and provided with block-like rests 3 at each end, the shoes being duplicates and their, ends being of uniform shape so that the shoes may be interchanged or reversed.I

The supporting spider, designated gener- States, residing at `eccentrically supported within and' objects relating to lpivot block to tak Serial No. 530,541.

ally by the numeral 4, is provided with an arm 5 carrying the posed arm 7, carrying the actuatingcam 8. On this pin 6 i face oppositely and having recess-like seats 10 for the rests 3 at one end of the shoes. The rests at the other end of the shoes bear against the actuating cam 8., as illustrated.

he pin is arranged so that the shoes are the drum, the advantage of this being that when the brake is set the shoes contact substantially throughout their periphery or their entire clutching surface.

Thef shoes are heldin position bv the springs 11 which are engaged with hooks 12 on inner sides of the shoes, there being a spring connection for the shoes at both ends S0 seats and against the actuating cam.

I have illustrated in Fig.II a shim 13 which may be arranged in the seat of the e up wear. These may be introduced or removed as occasion ay require. For instance, of the shoes wear away the shims maybe introduced to compensate for such wear. lVhen new facings are applied the shims would not be required. Thislnaks it ossible to easily maintain the brake in e ective condition as the shims may'be introduced without disassembling the parts, it only being necessary to force out the shoes against the tension of the springs and sli the shims into the seat of the pivot block;

hen it is desired to disassemble the lparts the shoes maybe removed without removing bolts or the like other than such as may be necessary to afford access to the s oes.

Having thus described my invention, what claim as new and desire to secure by Letters Patent, is:

1. The combination of a drum, a pair of segmental shoes having block-like rests at each end, said shoes being duplicates and of uniform shape at both ends so' that they may be interchanged and reversed, a spider provided with projecting arms, one of which carries a pin and the other an actuatin cam, oppositely facing pivotv blocks mounted on said pin and havlng. recess-like seats adapted to. receive the rests at one end of said shoes with. the rests'at the other end 'coacting with 'said actuating cam,

and connecting the ends springt?A where y they are yleldingly held upon their are pivot blocks 9 disposed to that they'are yieldingly held in. their as the faeings v14 of said shoespin 6 and with an op-v gia) pivot blocks and against, Said actuating cam.

:2. The combination of a drum, segmentai shoes having rests at; each end, a shoe suoporting piu, an actuating Cain, pivot bloc S mounted 0n said pin and having seats adapted to ieceive 'the rests at one end o said shoes with the ests at the othei end eoaoting With said actuating cam, and springs connecting the ends of said Shoes Wiie'eoy www they are yieldingiy heid upon theii pivot 10 blocks and against" said actuating cam.

In witness whereof, I have hereunto set my hand and seal'in the presence of two Witnesses.

GEQRGE J. THGMAS. in. 5.]

Witnesses JAS. XV. PARMELEE, ANDREW LANGENBAGHER- 

